ASUS · Motherboard

ASUS PRIME B550M-A WIFI II

B550 · AM4 · mATX · DDR4

See today's price, delivery and offers at the store.

Buy nowAdd to your build

Chipset B550
Form factor mATX
Memory slots 4
Max memory 128 GB
Socket AM4
Memory type DDR4

ASUS PRIME B550M-A WIFI II is a mATX and B550 chipset motherboard for AM4 processors and DDR4 memory.

Socket: AM4

Specifications

Key specs

Chipset: B550
Form factor: mATX
Memory slots: 4
Max memory: 128 GB
Socket: AM4
Memory type: DDR4
Part number: 90MB19X0-M0EAY0
EAN / UPC: 4711081309741

Processor

Processor manufacturer: AMD
Processor socket: Socket AM4
Compatible processor series: AMD Ryzen 3000 Series, AMD Ryzen 5000 Series
Supported processor sockets: Socket AM4

Memory

Supported memory types: DDR4-SDRAM
Number of memory slots: 4
Memory slots type: DIMM
Memory channels: Dual-channel
ECC сompatibility: ECC
Supported memory clock speeds: 2133,2400,2666,2800,3000,3200,3333,3466,3600,3733,3866,4000,4133,4266,4400,4466,4600,4800,4866 MHz
Maximum internal memory: 128 GB
Unbuffered memory: Yes

View all specifications +10 more sectionsShow fewer specifications

Storage controllers

Supported storage drive types: HDD & SSD
Supported storage drive interfaces: M.2, PCI Express 3.0, PCI Express 4.0, SATA III
Number of storage drives supported: 6
RAID support: Yes
RAID levels: 0, 1, 10

Graphics

Parallel processing technology support: Not supported

Internal I/O

USB 2.0 connectors: 2
USB 3.2 Gen 1 (3.1 Gen 1) connectors: 1
Number of SATA III connectors: 4
S/PDIF out connector: Yes
Front panel audio connector: Yes
ATX Power connector (24-pin): Yes
Number of EATX power connectors: 1
CPU fan connector: Yes
Number of chassis fan connectors: 2
EPS power connector (8-pin): Yes
Number of COM connectors: 1
TPM connector: Yes
12V power connector: Yes
RGB LED pin header: Yes

Rear panel I/O ports

USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity: 4
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity: 2
Ethernet LAN (RJ-45) ports: 1
PS/2 ports quantity: 1
VGA (D-Sub) ports quantity: 1
HDMI ports quantity: 1
HDMI version: 2.1
DVI-D ports quantity: 1
Headphone outputs: 1
Microphone in: Yes
WiFi-AP antenna jack: 1
USB connector type: USB Type-A

Network

Ethernet LAN: Yes
Ethernet interface type: Gigabit Ethernet
LAN controller: Realtek RTL8111H
Wake-on-LAN ready: Yes
Wi-Fi: Yes
Top Wi-Fi standard: Wi-Fi 6 (802.11ax)
Wi-Fi standards: 802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
Bluetooth: Yes
Bluetooth version: 5.2

Features

Motherboard chipset: AMD B550
Audio output channels: 7.1 channels
Product colour: Multicolour
Component for: PC
Motherboard form factor: micro ATX
Motherboard chipset family: AMD
Windows operating systems supported: Windows 10 x64, Windows 11 x64

Expansion slots

PCI Express x1 (Gen 3.x) slots: 2
PCI Express x16 (Gen 4.x) slots: 1
Number of M.2 (M) slots: 2
1st M.2 largest key size: 22110
1st M.2 highest PCI Express generation: 4.0
2nd M.2 largest key size: 2280
2nd M.2 highest PCI Express generation: 3.0

BIOS

BIOS type: UEFI AMI
BIOS memory size: 256 Mbit
Clear CMOS jumper: Yes

Weight & dimensions

Width: 244 mm
Depth: 244 mm
Height: 67 mm

Other features

Weight: 845 g
Packaging content: 2 x SATA 6Gb/s cables 1 x ASUS Wi-Fi moving antennas 1 x I/O Shield 1 x M.2 SSD screw package 1 x Support DVD 1 x User manual

Check the manufacturer's page before buying.

Ready to buy? Get the ASUS PRIME B550M-A WIFI II at today's price.Buy now

Compatible processors

AM4 socket

AMD Ryzen 5 56006 cores · 12 threads
AMD Ryzen 5 55006 cores · 12 threads
AMD Ryzen 5 5600G6 cores · 12 threads
AMD Ryzen 7 5700X8 cores · 16 threads
AMD Ryzen 5 5600X6 cores · 12 threads
AMD Ryzen 5 5500F6 cores · 12 threads
AMD Ryzen 5 5600F6 cores · 12 threads
AMD Ryzen 5 5600T6 cores · 12 threads

Compatible memory

DDR4

Kingston FURY Beast 8GB (1x8) DDR4-3200 CL168 GB (1x8) · DDR4
Kingston FURY Beast 16GB (2x8) DDR4-3200 CL1616 GB (2x8) · DDR4
VeloxStor 7004-DDR, 8 GB, 1 x 8 GB, DDR4, 3200 MT/s, 288-pin DIMM8 GB (1x8) · DDR4
VeloxStor 7005-DDR, 16 GB, 1 x 16 GB, DDR4, 3200 MT/s, 288-pin DIMM16 GB (1x16) · DDR4
VeloxStor 7006-DDR, 32 GB, 1 x 32 GB, DDR4, 3200 MT/s, 288-pin DIMM32 GB (1x32) · DDR4
VeloxStor 7007-DDR, 8 GB, 1 x 8 GB, DDR4, 3200 MT/s, 288-pin DIMM8 GB (1x8) · DDR4
VeloxStor 7008-DDR, 16 GB, 1 x 16 GB, DDR4, 3200 MT/s, 288-pin DIMM16 GB (1x16) · DDR4
Biwin BXH41632HW1-D16EW 16 GB DDR4 Memory16 GB (2x8) · DDR4

About this product

ASUS Prime series is expertly engineered to unleash the full potential of 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series AMD Ryzen platform. Boasting a robust power design, comprehensive cooling solutions and intelligent tuning options, Prime B550 series motherboards provide daily users and DIY PC builders a range of performance tuning options via intuitive software and firmware features. Tune It Your Way Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.

UEFI BIOS

The renowned ASUS UEFI BIOS provides everything you need to configure, tweak and tune your system. It offers intelligently simplified options for PC DIY beginners, as well as comprehensive features for seasoned veterans. Advanced Tuning for Serious Tweakers An intuitive Advanced mode offered via the UEFI lets you take complete control.

User manual (PDF)

PRIME B550M-A WIFI II vs similar motherboards

	ASUS PRIME B550M-A WIFI II	ASUS Prime B550M-A (mATX)	Gigabyte B550M GAMING X Motherboard	Gigabyte B550M X AORUS ELITE Motherboard
Chipset	B550	B550	B550	B550
Form factor	mATX	mATX	mATX	mATX
Memory slots	4	4	4	4
Max memory	128 GB	128 GB	128 GB	128 GB
Socket	AM4	AM4	AM4	AM4
Memory type	DDR4	DDR4	DDR4	DDR4
Released	—	—	2026	2026